Watchcase pendant construction



Dec. 14 1926.

H. K. FOSTER ,WATCHQASE PENDANT CONSTRUCTION Filed Jan. 8, 1926 INVENTOR Mu 54 ATTORNEYS Patented Dec. 14, 1926.

UNITED STATES PATENT OFFICE.

HERBERT K. FOSTER, OF RIVERSIDE, NEW] JERSEY, ASSIGNOR TO THE KEYSTONE WATCH CASE COMPANY, OF RIVERSEDE, NEW JERSEY, A CORPORATION OF PENN SYLVANIA.

WATCHCASE PENDANT CONSTRUCTION.

Application filed January This invention relates to a new and improved dust-prool. connection between the crown and pendant of a watch case. 1

One oi? he objects of this invention is to provide a very simple and etiieient construction whereby the joint or connection between the crown and pendant is made so tight that it is dust-proof, moisture-proof, etc. I

Another object of this invention is to provide a simple and ellicient dust-cap for said purpose.

Other objects oi this invention will be set torthin the following description and drawings which illustrate a preferred embodinent ther of, it being understood that the above general statement ot the objects of this invention is intended to generally explain the same, and not to limit it in any manner.

Fig. 1 is an elevation showing my inven tion applied to a watch case of standard form and having a bow, crown and pendant of standard form, a portion of the watch case being illustrated as broken away, for the sake of clearness.

2 is a sectional view showing the n dust a ssei bly ot the pendant, crown and 6 is a detail view. V The watch case W has bow B and a pendant "J 1th a central post E.

provided with an internally in which the stem l"; is secured. .Chese parts require no detailed description as th y are in themselves wellh own. hows how the stem K actuate-1 the zrs of the watch.

The dust-cap A is of general cylindical contour, and it is provided with a top flange (1 and an angular side projection D. This (lustcap A is preferably made oi springy metal. The cylindrical portions of the wall of the cap A are adapted to fit very tightly on member E. The internal diameter of ca A may be made slightly smaller than the external dian'ieter of member E, so that some force is required to locate cap A in the position shown in Fig. 2, and a firm frictional grip is secured between members i and A. Any lit which is sufiiciently tight to exclude dust and the like is within the scope of my invention.

i'Vhen the crown B is forced into position, it abuts the flange G and may slightly depress the same, although it would not be departing from the invention to have the crown l5 merely abut or be close to flange G. The inner diameter of crown B may be slightly less than the external diameter of the angular shoulder D so that a very tight litis secured between members B and D, although the crown B can be readily turned in the well-known manner. However, when the crown is turned for winding purposes, the cap A does not turn on member E, because the frictional bearing surface between members E and A is sufficient to keep the cap A stationary. However, the frictional grip between shoulder D and crown B is preteraby made so strong, that when the crown is removed from the pendant, the cap A is moved longitudinally or is removed simultaneously therewith. The crown B may be provided with an inner groove which so shallow that it does not appear except in Fig. 6, where it is indicated by the rence letter D and the shoulder D can ing into this inner groove, so as to provide a dust-tight joint which will enable the crown to freely turn, and at the same time facilitate the removal of cap A together with crown B.

have do. ibed a preferred embodiment of this invention but it is clear that numerous changes and ommissions could be made without departing from its spirit.

I claim 1. A resilient metal dust cap for a watch case pendant having an outer laterally con tinuous and laterally projecting member in ter e te the ends thereof.

ln combination, a watch case pendant having a projection, a crown mounted over said projection and provided with a recess having an inner wall, and a dust cap located intermediate said projection and inner wall, said dust cap snugly abutting said projection to make a dust-tight tit and having a lateral flange, the end Wall of said recess snugly abutting the said flange, said dust cap also snugly abutting the inner Wall of the said recess to make a dust-tight fit.

in combination, a watch case pendant having a projection, a crown mounted over said projection and provided With a recess having an inner Wall, and a dust cap located intermediate said projection and said inner wall, said dust cap snugly abutting said projection to make a dust tight fit and hav ing an outer lateral projection, the inner wall of said recess having a groove Which is engaged by said projection.

4:. In combination, a Watch case having a projection, a crown mounted over said projection and provided with a recess having an inner Wall, and a dust cap located intermediate said projection and said inner Wall, said dust cap snugly abutting said projection to make a dust tight fit and having an outer lateral projecting member adapted to abut said inner Wali to mak a dust tight tit.

in testimony whereof I afiix my signature.

HERBERT K. FOSTER. 

